Deleting and Clearing Your Timeline (Mac & iOS)

How do I delete my timeline?

iOS

Open the Accounts screen by tapping and holding on your avatar
in the upper left, or by opening the sidebar and selecting the
Accounts button. From there, tap and hold on an account to bring up
editing mode. Tap on the red "X" next to an account to either
delete the account from Twitterrific or to clear the cache, thus
clearing the timeline.